Widget ID and Category Conflicts? (1 post)

I'm running the latest version of Sitewide and Sitewide Tags. I've discovered there appears to be a conflict between the id of a widget ('river') on the receiving blog and the category name used by the sending blog. If I send a post with the category 'river', the receiving blog strips the category from the post. But if I use a category other than 'river', the post and category are received without problem.